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RRUK
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Member Since: 31 Mar 2010
Location: Leicestershire
Posts: 2025
United Kingdom 
Tracing an electrical fault
Although not my first priority for the Land Rover, the JVC CD radio has an issue.

I switch it on, it stays on for about ten seconds then switches itself off, then on again, and just keeps doing this until eventually it won't come on at all. Ideally I'd like a newer head unit that can take an Aux input and a USB drive. (CD's are a bit old hat now eh?)

I know that this could be the head unit itself, but I am guessing it won't be as easy as that, and will be a wiring issue, such as an intermittent supply issue, loose connection or dry joint in a connector plug - all my inexperienced guesswork (but sounds quite convincing Very Happy )

So, after I pull out the head unit, can anyone give me any tips on how to find an electrical problem like this. I do have a half decent multimeter.

I've learnt loads tonight about soldering in my other thread, hoping you can help me with this one too.

Thanks chaps Thumbs Up 2016 D4 HSE

1998 110 TUM HS FFR Hard Top XD WOLF

1982 Series 3 SWB Petrol

Last edited by RRUK on 7th Feb 2012 10:42pm. Edited 1 time in total
Post #122247 7th Feb 2012 10:26pm
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DAZ110



Member Since: 06 Dec 2007
Location: East Sussex
Posts: 2045
United Kingdom 2013 Defender 90 Puma 2.2 XS CSW Barolo Black
I once had a JVC cd radio that used to turn itself on by itself unless it had a cd in it Exclamation Confused

I sold the vehicle/radio to my brother and it went wrong recently as it would not respond to anything you tried to input into it so could be a common similar JVC head unit fault?
Post #122254 7th Feb 2012 10:41pm
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cradgebank



Member Since: 30 Dec 2008
Location: Nottingham
Posts: 308
England 2008 Defender 110 Puma 2.4 XS CSW Stornoway Grey
Suspect the Head unit has a fault rather than a wiring issue. Richard

Either a 90, 110 or 130.
Discovery 5
Post #122268 8th Feb 2012 3:37am
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dgardel



Member Since: 30 Nov 2008
Location: Veneto (Heart & Head)
Posts: 3586
Italy 
Normally the radio units need +12V ignition (ON with key) and +12V permanet (battery), check the corrispondence with the radio pin out. Discovery 5 td6 HSE Stornoway Gray Outback Engineering Limited Edition

IID Pro MV License
Post #122269 8th Feb 2012 3:54am
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landroverdiver



Member Since: 13 Jun 2009
Location: Renfrewshire
Posts: 193
Scotland 
I had a similar problem. It was a cheapo Aldi head unit and I had to pull the head unit out, pull off the plug connector on the back of the head unit, put it back on and hey presto, until the next time!

Cured by replacing the head unit with a new JVC one.
Post #122395 8th Feb 2012 6:03pm
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